Rearview Mirror Assemblies With Anisotropic Polymer Laminates

Abstract

Anisotropic film laminates for use in image-preserving reflectors such as rearview automotive mirror assemblies, and related methods of fabrication. A film may comprise an anisotropic layer such as a light-polarizing layer and other functional layers. The film having controlled water content is heated under omnidirectional pressure and vacuum to a temperature substantially equal to or above a lower limit of a glass-transition temperature range of the film so as to be laminated to a substrate. The laminate is configured as part of a mirror structure so as to increase contrast of light produced by a light source positioned behind the mirror structure and transmitted through the mirror structure towards a viewer. The mirror structure is devoid of any extended distortion and is characterized by SW and LW values less than 3, more preferably less than 2, and most preferably less than 1.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation-in-part of U.S. patent application Ser. No. 12 / 629,757 filed on Dec. 2, 2009, which is a continuation-in-part of U.S. patent application Ser. No. 12 / 496,620 filed on Jul. 1, 2009 and now published as U.S. 2009 / 0296190, which is a continuation-in-part of U.S. patent application Ser. No. 12 / 191,804 filed on Aug. 14, 2008 and now issued as U.S. Pat. No. 7,679,809, which is a continuation of U.S. patent application Ser. No. 11 / 179,793 filed on Jul. 12, 2005 and now issued as U.S. Pat. No. 7,502,156, which claims priority from U.S. Provisional Application No. 60 / 587,113 filed on Jul. 12, 2004. The present application claims priority from each of the abovementioned applications. The U.S. patent application Ser. No. 12 / 496,620 also claims priority from U.S. Provisional Applications Nos. 61 / 079,668 filed on Jul. 10, 2008 and 61 / 093,608 filed on Sep. 2, 2008. The disclosure of each of the above-mentioned a...

AI Technical Summary

Benefits of technology

[0008]In accordance with another embodiment of the invention, a method is provided for fabricating a laminate containing an APBF for use in a rearview mirror assembly. The method includes disposing a film structure characterized by a predetermined water content and having a layer with anisotropic optical properties on a substrate to form a composite. The method further includes applying heat and pressure at controlled humidity levels and, optionally, vacuum to the composite under conditions causing formation of a laminate that comprises a part of the image-forming and image-preserving reflector characterized by SW and LW values that are less than 3, preferably less than 2, and most preferably less than 1. According to one embodiment of the invention it is preferred that the water content of the APBF prior to lamination be less than about 0.6 weight-%, more preferably less than about 0.4 weight-%, even more preferably less than 0.2 weight-%, and most preferably less than about 0.1 weight-%. The temperature selected to laminate the composite may be within a range from about 50° C. to a...

Problems solved by technology

Integration of backup or other displays behind the automotive rearview mirror is generally preferred over placing them adjacent to the mirror, thereby increasing the area of the overall mirror assembly and impairing the driver's view through the windshield.

A particular challenge presented by dis...

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